Estimation of porosity from solid phase Chloride content

MARUM - Sediment Geochemistry - Leobener Str - D-28359 Bremen - Germany

Marine Geochemistry - Laboratory Methods

basics

assuming all the chloride measured in a dry marine sediment stems from the pore water chloride, the solid phase chloride content as measured from i.e. XRF may be used to estimate the porosity

equation

p [%] = 100 (1+ c_solution(? c_solid)^-1 )^-1

parameters

name	unit	description	typ. value
p	% Vol / Vol	porosity of marine sediment	70
c_solution	mg L^-1	concentration of Cl in seawater	19354
c_solid	mg kg^-1	concentration of Cl in dry sediment	10000
?	g cm^-3	density of mineral component of marine sediment	2.65

example

c_solution = 19354 mg L^-1; c_solid = 11260 mg kg^-1;? = 2.65 g cm^-3:porosity = 60.7%

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